30mpg in the stang, possible?

Discussion in 'Fox 5.0 Mustang Tech' started by mr.b, Apr 11, 2005.


  1. mr.b

    mr.b Founding Member

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    what would it take to get as close to 30mpg (on the highway) as possible with the stang. My thoughts are, 5 speed, 2.73 gear, all synthetics throughout the drivetrain, lean fuel mixture (with egr functioning good), drop some weight, pump up the tires, what else? This is just something i have been thinking about with the costs of gas rising.
     
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  2. Moffa

    Moffa New Member

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    Be light on the gas and also make sure your air filter is clean i hear that makes a difference in gas mileage.
     
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  3. I_AM_CANADIAN

    I_AM_CANADIAN Member

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    30mpg on highway only, fat chance in hell in city
     
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  4. BaXTeR3221

    BaXTeR3221 Member

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    Tune up would prolly help, fuel filter and what not.
     
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  5. wythors

    wythors Get off my lawn!!! Founding Member

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    In my AOD convertible with the stock 3.27 gears the best I ever got was just over 27 mpg on a trip to Reno. I've never come even close to that since.
     
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  6. squeeeg

    squeeeg Founding Member

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    A well tunes 5 speed with 2.73's should have no problem with 30mph. You would just have to have a light foot. I get 22-25 with my gears in the city so ya it is very possible.
     
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  7. HISSIN50

    HISSIN50 "How long does it take to get help in here? SN Certified Technician

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    agreed. there are folks in here pushing 300 hp with a good tune (or just luck) who can crank out nearly 30 in the HW, w/o actually trying to really optimize economy.

    it probably depends upon the highway speed too - 55 mph might be better than 65 or 75+ since we have the aero of an outhouse in a tornado.
     
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  8. igotyofire

    igotyofire Member

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    get a t56....two overdrives,lol and run low gearin with that
     
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  9. Shakerhood

    Shakerhood Well-Known Member

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    When my car had the stock 3.08s I got 27 on the highway before.
     
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  10. ExplodingGopher

    ExplodingGopher New Member

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    Get a 22 speed tranny (11 high and 11 low) from a diesel rig and maybe, well not really. lol
     
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  11. 89roadster

    89roadster Founding Member

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    The best I've ever had was about 27-28 mpg and that's with the 5 speed and stock gears (2.73) all interstate going about 65 mph through a very very flat landscape most of the way.

    I don't think constant 30 mpg is possible without reducing a lot of weight (I have a vert, so that alone is killing the mpg).

    Don't go lean, your engine will run hotter and the fan will need to run more - yet losing more power. If anything, you'd want to run your heaters full blast so it helps dissapate the engine heat so the fan will never start.
     
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  12. OL' WHITEY

    OL' WHITEY New Member

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    I'm going to get flamed for this, but I've recently tried running 3 oz. of pure acetone in a full tank with good results. I can't wait to hear the replies to this. So far, I've run two tanks through and no problems. Mileage has increased by around 20 percent. I do mostly city driving and my mileage has increased from 19 to 23 without changing my driving habits at all. Check out this site for more info.: http://peswiki.com/index.php/directory:acetone_as_a_fuel_additive I HAD to try it. It's not something I intend to do for an extended period of time, but it does work. Okay, fire up the flame throwers! I'm outta here!
     
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  13. mr.b

    mr.b Founding Member

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    ol whitey, i tried looking at that website and it wasn't there or didn't work.

    89roadster, going richer (i.e. not leaner) would decrease fuel mileage because it would be putting more fuel into the engine. As long as i don't run into detonation and overheating problems (cruising on the interstate should be plenty of air across the radiator) leaner should be better. Just look at some of the honda civic fuel economy engines they are "lean burn" engines.
     
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  14. OL' WHITEY

    OL' WHITEY New Member

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    Yes it does. It just looks like it doesn't work. Check the left side of the screen under "navigation", "featuring and acetone increases gas mileage.
     
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  15. mr.b

    mr.b Founding Member

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    thanks, I found it
     
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  16. 89roadster

    89roadster Founding Member

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    I'm lost - I'm not saying go rich either, there's AF ratio that the mustang runs happy at, you shouldn't deviate from it.
     
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  17. 5spd GT

    5spd GT "the 5.0 owns all" Founding Member

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    I think to get that magical 30mpg number with the age of these cars right now would be pretty rare but I wouldn't say it isn't impossible.

    A nice in-tune car with little to no fluctuation of the gas on the interstate (only) I could possibly see it with some longer gears :shrug:

    The ls1 with the 6spd have had some owners get 30mpg on some of their "road trips"...that is pretty nice in my opinion and have a comfortable car that can do that with the A/C on :nice:
     
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  18. DarkMesa8

    DarkMesa8 Founding Member

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    My 4 banger Mustang barely gets 30mpg on the highway, I'll be very shocked when I see a GT do the same.

    To maximize your highway mileage, run with as little weight as possible, windows up, and venting (no AC). Go as slowly as you can safely on the highway and use cruise control 100% of the time if possible. Inflate your tires to maximum factory specs, make sure there's a good airfilter in there, etc (tune up things).

    Fill up right before the onramp, and fill up right after you finish your long trip. If you have to fill up a few city miles from the onramp, forget about it. If you hit traffic, forget about it.

    With a 5spd, I still don't think you'll see 30mpg highway with a GT. AOD? Yeah right.

    When you do see someone chime in claiming they get 30mpg with 4.10's, its because their speedo and odometer are off.

    A viper spec T56 is probably your best shot, but even the 2002 Camaros/TAs were only rated at 25mpg highway along with the 2005 Corvettes, and those motors have technology written all over them.
     
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  19. tjm73

    tjm73 Founding Member

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    Acetone is a solvent, so I have to wonder what it A.) does to engine internals, B.) if it breaks down oil (ie..blow by into the crank case), C.) what does it turn into after the combustion process, D.) does it damage the catalytic converters, and E.) wht does it change/add to the tail pipe emissions?

    From http://en.wikipedia.org/wiki/Acetone
    "In chemistry, acetone (also known as dimethyl ketone, 2-propanone, propan-2-one and beta-ketopropane) is the simplest representative of the ketones.

    Acetone is a colourless mobile flammable liquid with melting point at -95.4 °C and boiling point at 56.53 °C. It has a relative density of 0.819 (at 0 °C). It is readily soluble in water, ethanol, ether, etc., and itself serves as an important solvent. The most familiar household use of acetone is as the active ingredient in nail polish remover. Acetone is also used to make plastic, fibers, drugs, and other chemicals.

    As a member of the ketone bodies it is present in very small quantity in normal urine and in the blood. Larger quantities can be found after starvation and in diabetic patients with severe insulin deficiency (that is untreated or inadequately treated persons); a fruity smell of the breath caused by acetone is one symptom of diabetic ketoacidosis. See ketone bodies for more information.

    Acetone occurs naturally in plants, trees, volcanic gases, forest fires, and as a product of the breakdown of body fat. It is present in vehicle exhaust, tobacco smoke, and landfill sites. Industrial processes contribute more acetone to the environment than natural processes. It is found among the products formed in destructive distillation of wood, sugar, cellulose, etc., and for this reason it is always present in crude wood spirit, from which the greater portion of it may be recovered by fractional distillation.

    It forms a hydrazone with phenyl hydrazine and an oxime with hydroxylamine. Reduction by sodium amalgam converts it into isopropyl alcohol; oxidation by chromic acid gives carbon dioxide and acetic acid. It reacts with ammonia to form di- and triacetoneamines. It also unites directly with hydrocyanic acid to form the nitrile of α-oxyisobutyric acid.

    By the action of various reagents, such as lime, caustic potash, hydrochloric acid, etc., acetone is converted into condensation products, mesityl oxide C6H10O, phorone C9H14O, etc., being formed. On distillation with sulfuric acid (H2SO4), it is converted into mesitylene C9H12 (symmetrical trimethyl benzene). Acetone has also been used in the artificial production of indigo. In the presence of iodine and an alkali it gives iodoform.

    Swallowing very high levels of acetone can result in unconsciousness and damage to the skin in the mouth. Skin contact can result in irritation and damage to the skin.

    The smell and respiratory data are known mostly from animal studies. Kidney, liver, and nerve damage, increased birth defects, and lowered reproduction ability of males (only) occurred in animals exposed long-term. It is not known if these same effects would be exhibited in humans."
     
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  20. 04sleeper

    04sleeper Founding Member

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    :rlaugh: :lol: :rlaugh: True!


    Believe it or not cars with superchargers actually get better mileage, as long as you keep your foot out of it and have a conservative tune. I have had many friends confirm this theory.

    I kind of like to think of an engine being nothing more than a big air pump and the supercharger makes it a more effiecient air pump. :shrug:
     
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